An electrical connector is provided with a stud connector hole disposed into one end thereof which has a shallow V-groove therein, the flanks of the V-groove provided with threads for both sizes of studs commonly disposed therein wherein the threads of the smaller diameter stud are disposed into the flanks of the V-groove spaced from the threads of the larger diameter stud. The shallow V-groove provides at least two areas of contact on either size stud inserted therein, the areas of contact maintained along the length of the stud.